__May 5th，2017，the C919 took off successfully for the first time at Shanghai International Airport．（ ）
| A． |
On |
B． |
In |
C． |
At |
D． |
Of |
__May 5th，2017，the C919 took off successfully for the first time at Shanghai International Airport．（ ）
| A． |
On |
B． |
In |
C． |
At |
D． |
Of |
试题篮
()
粤公网安备 44130202000953号
